Windmill-tower



(No Model.) 2 Sheets-Sheet 1.

H. ROBINSON. WINDMILL TOWER.

No. 446,744. Patented Feb. 17,1891.

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H. ROBINSON. WINDMILL TOWER.

No. 446,744. Patented Feb. 17,1891.

UNITED STATES PATENT EEIcE.

IIEBER ROBINSON, OF XVAUKON, IOWA.

WlNDMlLL-TOWER.

SPECIFICATION forming part of Letters Patent No. 446,744, dated February17, 1891.

Application filed August 12 1890- To all whom it may concern.-

Be it known that I, HEBER ROBINSON, a citizen of the United States,residing at Vankon, in the county of Allamakee and State of Iowa, haveinvented a new and useful Improvement in \Vindmill-Towers, of which thefollowing is a specification.

This invention relates to improvements in windmill towers or derricks.

The object of the invention is to provide a support for a windmill,which is so constructed that the wind-wheel can be raised in a positionfor use or lowered when it is desired to inspect the parts or makerepairs.

Prior to my invention it has been proposed to construct a derrick sothat a portion thereof would be pivoted to the base, which can be seenby reference to the patents to Perry, dated December 27, 1887, and July8, 1890, and my invention is designed more particularly as animprovement thereon; and it consists in the construction and combinationof the parts, as will be hereinafter fully set forth, and particularlypointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure1 is a perspective view showing the derrick in a posi tion for use. Fig.2 is a similar view showing the upper portion of the derrick lowered.

The foundation or base of the derrick is made up of the four cornerposts or uprights A A and A A, which are secured to each other bydiagonal braces a a and horizontal pieces Z) Z), those 011 one sidebeing located within the structure to provide an open space between theuprights A A. To the upper ends of the beams or uprights A are securedordinary strap hinges, and to the upper leaves of these hinges issecured the superstructure, which is made up of four converging sidepieces braced to each other in the usual manner. To a pair of these sidepieces are secured beams 13 B, which extend beyond said superstructure,as shown. To these beams are secured outwardly-extol":ding posts 6, theends of which are provided with eyes, through which pass truss-rods C C,the upper ends of said truss-rods being secured to angle-plates f, whilethe lower ends are threaded and pass Serial No. 361,846. a. model.)

through angle-plates f and engage tightening-nuts, as shown. The lowerends of the extended beam B are provided with a weight ed box D.

ll refers to a lever, which is pivoted at one end to the extended endsof the beams 13 B, the free end of said lever passing under a bail,while its outer end is adapted to engage with a catch g, attached nearthe lower end of one of the uprights A, and by means of this lever thesuperstructure when raised to a vertical position can be locked.

The pitman-rod is jointed, as shown at F, so that it can be turned uponits hinge when the superstructure is lowered, as shown in Fig. 2. A ropeor flexible connection E extends from the top of the tower, passes underthe base, and is secured to the weighted box, this flexible connectionbeing of suflicient length to permit the person holding the same to moveto one side of the base to exert a downward pull upon the superstructureand cause the same to tilt when the locking-lever is released.

It will be particularly observed that the extended beams B lie withinthe uprights A when the device is in a position for use, and hold thesuperstructure so that it will set se curely upon the ends of theuprights AA and A A. It will also be noted that the windmill-towers incommon use may have my i1nprovement applied thereto by fitting to thestructure the beams B B and attaching the hinges, after which the mainuprights can be cut. Thus it will. be seen that in order to supply myimprovement it will not be necessary to do away with towers nowfurnished to the trade.

Having thus described my invention, whatI claim as new, and desire tosecure by Letters Patent, is-

1. The combination, with the base consisting of the corner uprights,braced as shown, of a superstructure hinged thereto and provided withtrussed beams B I3, which are adapted to lie between the uprights A ofthe base, and a locking-lever for connecting said beams to the base,substantially as set forth.

2. In a windmill-derrick, the combination of a base having uprights A A,connected to each other on their inner sides, and a superforming thebase, and the lower or extended structure hinged to the uprights A andproends of the trussed beams 13 B lie Within the vided with trussedbeams 13 B, saidtrussed uprights A A, substantially as set forth.

beams carrying at their lower ends aleeking- HEBER ROBINSON. lever, theparts being organized so that the XVitnesses:

ends of the beams forming the superstructure JOHN F. DAYTON,

will sit directly upon the ends of the uprights \VM. S. HART.

